
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
}


body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica Neue, Arial, Noto Sans, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", Segoe UI Symbol, "Noto Color Emoji";
  color: #7f7f7f;
}


main {
  display: block;
}


h1 {
  font-size: 2em;
  margin: 0.67em 0;
}

li {
  list-style: none;
}

hr {
  box-sizing: content-box;
  height: 0;
  overflow: visible;
}


pre {
  font-family: monospace, monospace;
  font-size: 1em;
}


a {
  background-color: transparent;
}


abbr[title] {
  border-bottom: none;
  text-decoration: underline;
  text-decoration: underline dotted;
}


b,
strong {
  font-weight: bolder;
}


code,
kbd,
samp {
  font-family: monospace, monospace;
  font-size: 1em;
}


small {
  font-size: 80%;
}


sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}


img {
  border-style: none;
}


button,
input,
optgroup,
select,
textarea {
  font-family: inherit;
  font-size: 100%;
  line-height: 1.15;
  margin: 0;
}


button,
input {
  overflow: visible;
}


button,
select {
  text-transform: none;
}


button,
[type="button"],
[type="reset"],
[type="submit"] {
  -webkit-appearance: button;
}


button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
  border-style: none;
  padding: 0;
}


button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
  outline: 1px dotted ButtonText;
}


fieldset {
  padding: 0.35em 0.75em 0.625em;
}


legend {
  box-sizing: border-box;
  color: inherit;
  display: table;
  max-width: 100%;
  padding: 0;
  white-space: normal;
}


progress {
  vertical-align: baseline;
}


textarea {
  overflow: auto;
}


[type="checkbox"],
[type="radio"] {
  box-sizing: border-box;
  padding: 0;
}


[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
  height: auto;
}


[type="search"] {
  -webkit-appearance: textfield;
  outline-offset: -2px;
}


[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
}


::-webkit-file-upload-button {
  -webkit-appearance: button;
  font: inherit;
}


details {
  display: block;
}


summary {
  display: list-item;
}


.container {
  width: 1200px;
  margin: 0 auto;
}


/*定义滚动条高宽及背景
 高宽分别对应横竖滚动条的尺寸*/
::-webkit-scrollbar {
  width: 2px;
  height: 2px;
  background-color: #F5F5F5;
}

/*定义滚动条轨道
 内阴影+圆角*/
::-webkit-scrollbar-track {
  -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
  border-radius: 10px;
  background-color: #F5F5F5;
}

/*定义滑块
 内阴影+圆角*/
::-webkit-scrollbar-thumb {
  border-radius: 10px;
  -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, .3);
  background-color: #555;
}

i{
  color: #4490f1;
}
